Vitamin A Nutrition Quiz
48 Questions
5 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to Lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What is the recommended dietary allowance (RDA) of Vitamin A for men?

  • 600 µg RAE/d
  • 700 µg RAE/d (correct)
  • 500 µg RAE/d
  • 800 µg RAE/d

Which form of Vitamin A is mainly stored in the liver and adipose tissue?

  • Retinol (correct)
  • Alcohol form
  • Aldehyde form
  • Acid form

What is the biological activity of β-carotene compared to retinol activity equivalent (RAE)?

  • ~ 30µg = 1µg retinol/RAE
  • ~ 12µg = 1µg retinol/RAE (correct)
  • ~ 6µg = 1µg retinol/RAE
  • ~ 24µg = 1µg retinol/RAE

What is the main function of Vitamin A in the body?

<p>Vision (B)</p> Signup and view all the answers

What is the RAE of Vitamin A for lactating females?

<p>950 µg/d (D)</p> Signup and view all the answers

What is the efficiency of retinol absorption compared to carotene?

<p>70-90% (D)</p> Signup and view all the answers

Which food item provides the highest amount of Vitamin A per serving?

<p>Beef liver, pan fried, 3 ounces (D)</p> Signup and view all the answers

What is the primary source of Vitamin A for the body?

<p>Carotenoids (C)</p> Signup and view all the answers

What is the RAE of Vitamin A for males aged 11-14?

<p>600 µg/d (D)</p> Signup and view all the answers

What is the main metabolic function of Vitamin A?

<p>Participates in the conversion of light into nerve impulses (A)</p> Signup and view all the answers

What is the efficiency of carotene absorption compared to retinol?

<p>5-60% (A)</p> Signup and view all the answers

What is the main cause of Vitamin A deficiency?

<p>Poor absorption (B)</p> Signup and view all the answers

Which of the following is a symptom of vitamin A deficiency?

<p>Impaired production of rhodopsin (B)</p> Signup and view all the answers

What is the function of retinoic acid in gene expression?

<p>Regulates the expression of structural proteins (C)</p> Signup and view all the answers

Which of the following is a measure of vitamin A status?

<p>Dark adaptation time (B)</p> Signup and view all the answers

What is a potential consequence of vitamin A toxicity?

<p>Liver and bone damage (A)</p> Signup and view all the answers

Which receptors bind to the retinoic acid response element (RARE) on DNA?

<p>$\alpha,\beta,\gamma$ retinoic acid receptor (RAR) (C)</p> Signup and view all the answers

What is the direct measure of vitamin A status?

<p>Liver biopsy (B)</p> Signup and view all the answers

What is the main function of retinoic acid in epithelial cells?

<p>Cell differentiation (A)</p> Signup and view all the answers

What is the role of carotenoids in the body?

<p>Function as antioxidants (C)</p> Signup and view all the answers

What is the recommended upper limit of dietary intake for vitamin A in pregnant women?

<p>3000-3300 µg (C)</p> Signup and view all the answers

What is the measure used to assess vitamin A status after vitamin A ingestion?

<p>Relative Dose Response test (D)</p> Signup and view all the answers

What is a potential consequence of vitamin A deficiency?

<p>Xerophthalmia (C)</p> Signup and view all the answers

What is the role of vitamin A in embryonic development?

<p>Cell differentiation (B)</p> Signup and view all the answers

What is the main function of retinoic acid in gene expression?

<p>Activates transcription (B)</p> Signup and view all the answers

Which receptors bind to the retinoic acid response element (RARE) on DNA?

<p>$\alpha,\beta,\gamma$ retinoic X receptor (RXR) (B)</p> Signup and view all the answers

What is the measure used to assess vitamin A status after vitamin A ingestion?

<p>Relative Dose Response test (C)</p> Signup and view all the answers

What is the direct measure of vitamin A status?

<p>Liver biopsy (D)</p> Signup and view all the answers

What is a potential consequence of vitamin A toxicity?

<p>Liver and bone damage (D)</p> Signup and view all the answers

What is the main cause of Vitamin A deficiency?

<p>Inadequate dietary intake (B)</p> Signup and view all the answers

What is the role of carotenoids in the body?

<p>Function as antioxidants (A)</p> Signup and view all the answers

What is the main metabolic function of Vitamin A?

<p>Regulates gene expression (D)</p> Signup and view all the answers

What is the main function of Vitamin A in the body?

<p>Vision (B)</p> Signup and view all the answers

What is the primary source of Vitamin A for the body?

<p>Fruits and vegetables (C)</p> Signup and view all the answers

What is the efficiency of retinol absorption compared to carotene?

<p>Higher (A)</p> Signup and view all the answers

What is the efficiency of carotene absorption compared to retinol?

<p>Lower (C)</p> Signup and view all the answers

What is the retinol activity equivalent (RAE) for 1µg of β-carotene?

<p>12µg (D)</p> Signup and view all the answers

What is the primary form of Vitamin A stored in the liver and adipose tissue?

<p>Retinol (C)</p> Signup and view all the answers

What is the recommended dietary allowance (RDA) of Vitamin A for women?

<p>600 µg (B)</p> Signup and view all the answers

What is the main metabolic function of Vitamin A?

<p>Participates in the conversion of light into nerve impulses (B)</p> Signup and view all the answers

What is the measure used to assess vitamin A status after vitamin A ingestion?

<p>Retinol Binding Protein (B)</p> Signup and view all the answers

What is the efficiency of retinol absorption compared to carotene?

<p>70-90% (D)</p> Signup and view all the answers

What is the RAE of Vitamin A for males aged 18-64?

<p>900 µg (C)</p> Signup and view all the answers

What is a potential consequence of vitamin A deficiency?

<p>Night blindness (D)</p> Signup and view all the answers

What is the efficiency of carotene absorption compared to retinol?

<p>Lower (B)</p> Signup and view all the answers

What is the main function of retinoic acid in gene expression?

<p>Regulates the expression of target genes (B)</p> Signup and view all the answers

Which food item provides the highest amount of Vitamin A per serving?

<p>Beef liver, pan fried, 3 ounces (D)</p> Signup and view all the answers

What is the biological activity of β-carotene compared to retinol activity equivalent (RAE)?

<p>Lower (D)</p> Signup and view all the answers

More Like This

Use Quizgecko on...
Browser
Open
Browser
Browser